Rear Wheel Horsepower Gains out of Roller Rockers???
06-23-2006 | 04:33 PM
#41
Originally Posted by vettenuts
Except, Waterbug1999 is running a pretty stout cam, what is the number on it? (lift/duration). You may be exceeding the Dart spring capability, or have you already gone to different springs?
06-23-2006 | 04:36 PM
#42
Originally Posted by Mark Campbell
The 144833-16 springs have been available for about 2 months. We have taken extraordinary steps to assure very high quality with these springs. In addition to being made from super clean, extra high tensile chrome-silicon valve spring wire, the wire is tested before coiling and these pieces have been 100% magnaflux inspected after coiling! They use the same retainers and spring seats as our 144832's. The improved wire and harmonic design make these an extremely good choice for hydraulic and solid applications up to 7000RPM. Some lobe grinds will work with this spring beyond 7300. The dual design and 100% magnaflux, after coiling, assure reliability.
At a standard 1.800" installed height, the 144833-16 springs set up at 137#. Installing our 144460-16 spring seat locator (that is .055" thick) will raise the seat pressure to 157#. These springs can safely be run to a compressed height of 1.130".
There has never been a reliability issue with these springs. There were 12 preproduction sets that were made in February, but these were never sold), where we noticed that the inner spring hit coil bind approximately .010" before the outer spring. This is not desireable since it appears the spring is OK even when the inner is bound. We added less than one "dead"coil on the outer spring so that it would coil bind before the inner (just to help prevent customer error). The "dead coil has no affect on rate, performance or harmonics. That is absolutely the only change that was made from the original computer design of the spring.
Production delays occurred only on the availability of the wire diameter of XHT Chrome Sil that we wanted to use. Now that there are only two major manufacturers of super clean XHT valve spring wire in the world, delays sometimes occur.
There is no production scheduled for July as we currently have tens of thousands of these springs in stock. If there are other issues with the development and production of these springs, please let me know as I am supposed to be in charge of the project!
Hope this clarifies some points. If you have any questions on these springs or our line of LSx products please feel free to email me. Thanks for your business!
Mark Campbell
VP, R&D, Crane Cams Inc.
mcampbell@cranecams.com
At a standard 1.800" installed height, the 144833-16 springs set up at 137#. Installing our 144460-16 spring seat locator (that is .055" thick) will raise the seat pressure to 157#. These springs can safely be run to a compressed height of 1.130".
There has never been a reliability issue with these springs. There were 12 preproduction sets that were made in February, but these were never sold), where we noticed that the inner spring hit coil bind approximately .010" before the outer spring. This is not desireable since it appears the spring is OK even when the inner is bound. We added less than one "dead"coil on the outer spring so that it would coil bind before the inner (just to help prevent customer error). The "dead coil has no affect on rate, performance or harmonics. That is absolutely the only change that was made from the original computer design of the spring.
Production delays occurred only on the availability of the wire diameter of XHT Chrome Sil that we wanted to use. Now that there are only two major manufacturers of super clean XHT valve spring wire in the world, delays sometimes occur.
There is no production scheduled for July as we currently have tens of thousands of these springs in stock. If there are other issues with the development and production of these springs, please let me know as I am supposed to be in charge of the project!
Hope this clarifies some points. If you have any questions on these springs or our line of LSx products please feel free to email me. Thanks for your business!
Mark Campbell
VP, R&D, Crane Cams Inc.
mcampbell@cranecams.com
It was great talking to you and thanks for the clairification. As suggested, I'll get the 144833-16's from Vinci.
All,
Go forth and buy the new Crane 144833-16 spring, it's a great one.
06-23-2006 | 05:29 PM
#43
Originally Posted by vettenuts
Except, Waterbug1999 is running a pretty stout cam, what is the number on it? (lift/duration). You may be exceeding the Dart spring capability, or have you already gone to different springs?
06-23-2006 | 05:30 PM
#44
Originally Posted by 405HP_Z06
For 1.8's, you need Crane part number 144759-16. This includes rocker arms, studs, guide plates, pushrods, and poly locks.
Vettenuts has a new set for sale at a good price.
I would also recommend the Crane 144832-16 springs if you don't already have upgraded springs.
Vettenuts has a new set for sale at a good price.
I would also recommend the Crane 144832-16 springs if you don't already have upgraded springs.
06-23-2006 | 09:08 PM
#45
Originally Posted by waterbug1999
The lift is .600 and .610.. The dart heads are good up to .625.
06-26-2006 | 01:28 PM
#47
Originally Posted by waterbug1999
I read this from your website (what manufacturer claims) "Crane Cams Gold-Race, full-roller aluminum rockers for the LS1/LS6 engine family add up to 20 horsepower over stock!" $399.88
Is that true? Any dyno thread to back this up? If its true, ill get a set. 20 ponys for 400 bucks is awsome.
Is that true? Any dyno thread to back this up? If its true, ill get a set. 20 ponys for 400 bucks is awsome.
http://vincihighperformance.com/SALE...TH%202006.HTML
right now, they have a 10% off sale going on.
here's the dyno from the wife's car. this was with the stock cam. 1.8 accelerated lift rockers.
dyno 9 before
dyno 11 500 miles
dyno 14 10 months later
06-27-2006 | 11:35 PM
#48
Originally Posted by Evans752
I was wanting to put roller rockers on my car and was wanting to know what kind of gains I would see in horsepower? The car makes 422rwhp and 389tq right now. What are the best rockers for the money, because im not rich lol and fit the best. I seen that some need valve cover spacers and that maybe fine. All suggestions appreciated.
check out new era performance.com there is a set of 1.8 ratio comp cam gold roller rockers for an ls1 comes with the pushrods bolts and the rockers supposed to give you 32 rwhp for $799 which isnt bad at all and thats going to be my next project. 
06-28-2006 | 08:26 PM
#50
Originally Posted by slt200mph
I have a hard time beleiving that they would produce 32 rwhp... 
..sounds like a sales pitch to me..
..sounds like a sales pitch to me.. 